Relay switch for clock-controlled electric signal devices



April 15, 1924. 1,490,740

J. F. HIELSCHE'R RELAY SWITCH FOR CLOCK CONTROLLED ELECTRIC SIGNALDEVTCES Filed Feb. 15 1921 Patented Apr. 15, 1924.

UNTED STATES JOHN F. HIELSCEER, 0F SEATTLE, "WASHINGTON.

RELAY SWITCH FOR CLOCK CONTI-LOLLED ELECTRIC SIGNAL DEVICES.

Application filed February 15, 1921.

To all whom it may concern:

Be it known that I JOHN F. HmLsoHEn, a citizen of the United States,residing at Seattle, in the county of King and State of Vi ashington,have invented a certain new and useful improvement in Relay Switches forCloclcControlled Electric Signal Devices, of which the following is aspecification.

My invention relates to improvements in a relay switch for electricsignal systems .such as are used in hotels and other rooming houses andis an improvement upon the relay switch disclosed in my copcndingapplication for Letters Patent, Serial No. 226,304. filed April 2, 1918.

An object of my invention is to provide a signal system by means ofwhich the occupants of any number of rooms may be summoned by a callbell in direct circuit with an ordinary twelve hour clock that actuatesthe system by previously posting the connections necessary to makecontact at the desired time.

'Another object is to provide a novel means by which the bell may be cutout of the circuit by the occupant of a room after he has been called.

Further objects are tobe provided in the signal system which willrequire a minimum amount of wiring, which is practical and simple inconstruction, efficient and'reliable in operation, and which may bereadily installed at comparatively small cost.

With the above and other objects in view which will appear as thedescription proceeds the invention consists of the novel construction.adaptation, arrangement and combination of parts hereinafter describedand claimed.

I accomplish these objects by devices illustrated in the accompanyingdrawing, where- The figure is a view in diagram of a bell actuatingmechanism.

Referring to the drawing there is shown a bell 24 of any ordinary typeand having the usual two wire connections or terminals. A relay switchis provided to control the current from the battery 21 to the bell andto provide a means for normally establishing a circuit between the two.The switch is manually operable, however, to break this circuit and beretained in its abnormal po sition by the current from the battery.

The relay switch embodies a metallic base Serial No. 445,222.

leads to the terminal 42. The magnets 45 are further provided with awire 48 that connects the same to a contact 47 that is carried by thebase 30 and insulated therefrom. An armature 38 is pivotally secured tothe base 30' and grounded thereto. This armature is further providedwith a shunt arm 49 that is adapted to engage the contact 47 forestablishing a circuit to the magnets 45 to retain the armature 38against the poles of the same. The bell 24 is connected to the terminal42 by means of the wire 43 and to a-contact 40 by means of a wire 41.The armature 38 is adapted to normally engage the contact 40 to completethe circuit to the bell and to be removed from this contact for breakingthe circuit by pressing upon the bottom 39.

A switch 22 is included in the wire 27 which leads from the battery 21to the terminal 44 and is intended to be closed when the bell 24 is tobe sounded. After the bell has been sounded and the armature has beenmanually moved away from the contact 40 to break the circuit to thebell. a circuit will be established through the magnets 45 for retainingthe armature in its abnormal po sition away from the said contact. Theswitch 22 may then be opened for breaking the circuit to the magnets andthe resiliency of the armature will cause it to assume its normalposition in engagement with the contact 40. The circuit to the cell 24is then restored with the exception of the break made in the wire 27 bythe open switch 22.

To trace the operation of the system it will be seen that the currentwill flow from the terminal 44through the contact armature 38, bindingterminal 40 and wire 41 causing the bell 24 to ring and then pass overthe wire 43 back to the battery 21.

a After the bell 21 starts to ring a person may stop it by pressingdownwardly on the button 39 thus breaking the contact between thearmature 38 and the terminal 40 and cutting the bell 24 out of thecircuit. By so doing the shunt arm 49 will be brought into engagementwith the contact 47 and the armature 38 will engage the magnets 45. Thiswill close the circuit-within. the relay switch sulated contact.

30 allowing the current to flow from the terminal as through the shuntarm l9, the terminal l7 and wire d8 then through the magnets 4:5 back tothe battery 2l'by Way of the wire s6. ated in the magnets 45 will holdthe armature 38 out ot 'engagementwith the contact d0 as long as thecircuit is closed.

hat I claim is: r

1. Theicombination with an electric bell having two'wire terminals of abattery, a relay switch comprisinga metallic base plate having one wireterminal grounded thereto and a second wire terminal insulated there-.trom, wires from said battery to each, of

said switch terminals, a pair of magnets secured to said base plate, aninsulated contact carried by said base, a circuit from the in sulatedterminal'ol said switch to the inan armature pivotally mounted on, saidbase and grounded thereto, a shunt arm, carried by said armature, aconnection between said insulated switch terminal to one ofsaidbattery'terminals,

' and a contact connected with thes-econd bell terminal and, adapted tonormally be in engagementwith said armature to close the circuit throughsaid bell, said armature being manuallyoperable to break the circuit 1through, said bell for establishing a, circuit through said magnetand tobe. retained in The magnetism thusicresaid abnormal ,position by themagnetism of the same.

2. The combination with an electric bell having two Wire terminals of abattery, a relay swit h; comprising a metallic base plate having onewire terminal grounded thereto and a' -seco ndwire terminal insulatedtherefrom, wires from said battery to each of said switch terminals, apair of magnets secured to said base plate, an insulated con tactcarried by said base, a circuit from the insulated terminal oi? saidswitch through said magnets to the insulated contact, an .21!- maturepivotally mounted on said base and grounded thereto, a shunt arm carriedby said armature, a. connection between said insulated switch terminalto one of said bell terminals, and a contact connected with thesecondbell terminal and adapted to normally be in engagement with saidarmature to close the circuit through said bell said armature beingmanually operable to break the circuit through said bell to establish acircuit through said magnets by the means said armatureshunt and saidbase contact and to be retained in such abnormal 'position bythemagnetism of the same.

in witness whereof, i erennto subscribe my name this 5th day of FebruaryA. D. 1921.

JOHN F. HIELSCHER;

